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Flat Roofs That
Stay Dry.

Durable, watertight flat roof installations across Lincolnshire, Cambridgeshire & Norfolk — EPDM rubber, GRP fibreglass and felt systems for extensions, garages and dormers, properly insulated, correctly drained and fully guaranteed.

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2015
Trading Since
24/7
Emergency Cover
100%
Fully Insured
5.0★
Customer Rated
A newly installed flat roof on a modern extension by Riverstone Roofing
25yr+
System Lifespan
The Service

Modern Flat Roofs,
Built to Last

Today’s flat roofs are a world away from the leaky felt roofs of the past. At Riverstone Roofing we install seamless EPDM rubber, GRP fibreglass and high-performance felt systems on extensions, garages, dormers and outbuildings — engineered with the right falls, insulation and detailing to stay completely watertight for decades.

We’ll recommend the best system for your roof and budget, build in proper drainage, and finish every edge and outlet neatly — then back it with a guarantee.

Seamless & Watertight

Jointless EPDM & GRP systems with correct falls — no ponding, no leaks.

Guaranteed Installation

Fully insured, with workmanship and manufacturer guarantees.

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How It Works

Our Flat Roof
Installation Process

A proper flat roof is all in the preparation and detailing — here’s how we get it watertight and keep it that way.

1

Survey & System Advice

We assess the deck, the falls and drainage, then recommend the best flat-roof system and a fixed, no-obligation quote.

2

Strip & Prepare the Deck

We remove the old covering and inspect the timber deck, repairing or replacing any damaged or rotten boards.

3

Insulation & Falls

Where needed we add insulation (warm-deck) and firrings to create proper falls so water always drains away.

4

Membrane Installation

Your chosen system — EPDM rubber, GRP fibreglass or felt — is installed seamlessly across the whole roof.

5

Trims, Outlets & Detailing

Edge trims, drip details, upstands and outlets are fitted for a crisp, completely watertight finish.

6

Inspect, Test & Clean Up

We check the falls and seal, confirm the roof is watertight, then remove all waste and leave the site tidy.

What We Install

Flat Roof Systems
We Install

We work with all the leading flat-roof systems, so we can match the right solution to your building, budget and how the roof will be used:

EPDM Rubber Roofing

Single-piece rubber membrane with no joins or seams — flexible, hard-wearing and a 30+ year lifespan.

GRP Fibreglass

Seamless glass-reinforced plastic, exceptionally tough and ideal where the roof may take foot traffic.

High-Performance Felt

Modern torch-on built-up felt systems — a reliable, cost-effective option done properly.

Warm-Deck Insulation

Energy-efficient build-ups that keep heat in and prevent condensation forming under the roof.

Rooflights & Lanterns

Flood the room below with natural light — supplied and fitted fully weatherproof.

Drainage, Outlets & Trims

Correct falls, outlets and crisp edge trims so water sheds fast and never ponds.

EPDM, GRP and felt flat roofing systems and materials – Riverstone Roofing, Lincolnshire & Norfolk
The Work

Seamless & Watertight

Roofer installing EPDM rubber flat roof membrane – Riverstone Roofing, Lincolnshire & Norfolk
EPDM rubber membrane
Roofer applying GRP fibreglass to a flat roof – Riverstone Roofing, Lincolnshire & Norfolk
GRP fibreglass
Crisp flat roof edge trim and outlet detail – Riverstone Roofing, Lincolnshire & Norfolk
Edge & outlet detailing
Questions & Answers

Flat Roof Installation FAQs

The things homeowners most want to know about a new flat roof. Got another question? Just give us a call.

A quality EPDM or GRP flat roof can last 25–30+ years with minimal maintenance — far longer than the old felt roofs they replace.

Each has its place. EPDM rubber suits most flat roofs (seamless, flexible, long-lasting); GRP fibreglass is ultra-tough and great where there’s foot traffic; modern felt is a reliable, budget-friendly choice. We’ll recommend the right one for your roof.

That reputation came from old felt roofs. Modern EPDM and GRP systems, installed with proper falls and detailing, are seamless and extremely reliable.

Most domestic flat roofs are installed in 1–3 days, depending on the size of the roof and access.

Yes — we regularly fit rooflights and lanterns as part of a new flat roof, fully weatherproofed and looking superb.

Always. Correct falls and outlets are essential, so we build in the right slope to shed water quickly and prevent ponding.

Yes — we’re fully insured, with workmanship and manufacturer guarantees on the system we install.

Flat roof installations across Lincolnshire, Cambridgeshire and Norfolk — Spalding, Boston, King’s Lynn, Peterborough, Grantham, Wisbech, Stamford and the surrounding areas.

Where We Work

Flat Roof Installations
Across the Region

We provide flat roof installations for homeowners across Lincolnshire, Cambridgeshire and Norfolk, including Grantham, Sleaford, Stamford, Bourne, Spalding, Boston, Skegness, Peterborough, Wisbech, March, Chatteris, King’s Lynn, Downham Market, Swaffham and Hunstanton. View all the areas we cover, or call 07704 805549 for a free, no-obligation quote.

At a Glance

Riverstone Roofing Quick Facts

Established
2015 — over a decade of local roofing experience
Areas Covered
Lincolnshire, Cambridgeshire & Norfolk
Services
New roofs, pitched & flat roof repairs, leadwork, chimneys, fascias & guttering, roof cleaning
Availability
24/7 emergency call-outs · Free, no-obligation quotes
Credentials
Fully insured roofing contractor
Contact
07704 805549 · contact@riverstoneroofing.co.uk
Get In Touch

Get Your Free
Roofing Quote

Tell us what you need and we’ll get straight back to you with a free, no-obligation quote — or call us any time, day or night.

07704 805549
Free QuotesFully Insured24/7 Cover

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